A verse that is often used to show that Torah cannot be changed in any way is Deuteronomy 4-2 

Deuteronomy 4-2 Ye shall not add unto the word which I command you, neither shall ye diminish ought from it, that ye may keep the commandments of the LORD your God which I command you.

The assertion being that if Torah cannot be added to or have anything removed from it then Torah must still remain. 

The Torah of the New Covenant must therefore be the same as the Torah of the Old Covenant. A new covenant but the same Torah. 

However Jesus very clearly did give a new command. He very clearly said a NEW commandment I give you. 

John 13-34 A new commandment I give unto you, That ye love one another; as I have loved you, that ye also love one another.

So did Jesus break the command of Deuteronomy 4-2 by doing so? The answer of course is no. He did not add anything to the first covenant law. Jesus was giving the command which would constitute the New Torah of the New covenant he was not adding to the law of the Old covenant in any way. Neither did he take anything away from the Old Torah in the old covenant. 

An important thing to notice is that in Deuteronomy 4-2 it explicitly states that YOU must not add or take away. However what It does NOT say that God cannot add or take away from the law.  In fact we see that God added laws throughout the 5 books of the Torah. 

Let’s just look at the law on divorce.  The law on divorce is found in the book of Deuteronomy 

Deuteronomy 24- 1 When a man hath taken a wife, and married her, and it come to pass that she find no favour in his eyes, because he hath found some uncleanness in her: then let him write her a bill of divorcement, and give it in her hand, and send her out of his house.

However Jesus stated that divorce was allowed in the law through Moses BUT it was not from the beginning. 

Matthew 19-8 He saith unto them, Moses because of the hardness of your hearts suffered you to put away your wives: but from the beginning it was not so.

This means that the law on divorce was added.  Even if Torah had existed before it was given to the Israelites, as some do assert, this law was added and was not in affect at the beginning. 

However we know that Moses was given the law by God. The law was given by God through Moses. Moses added only what God told him to add.  Showing that although man cannot add or take away, this in no way puts restrictions upon God himself. 

The law itself was added because of transgressions

Galatians 3-19 Wherefore then serveth the law? It was added because of transgressions, till the seed should come to whom the promise was made; and it was ordained by angels in the hand of a mediator.

The Israelites agreed to follow the 10 commandments at mount Sinai 

Exodus 19- 7And Moses came and called for the elders of the people, and laid before their faces all these words which the LORD commanded him. 8And all the people answered together, and said, All that the LORD hath spoken we will do. And Moses returned the words of the people unto the LORD. 

They also agreed to follow the law that Moses wrote down. 

Exodus 24- 3And Moses came and told the people all the words of the LORD, and all the judgments: and all the people answered with one voice, and said, All the words which the LORD hath said will we do. 4And Moses wrote all the words of the LORD, and rose up early in the morning, and builded an altar under the hill, and twelve pillars, according to the twelve tribes of Israel. 

BUT the law that Moses wrote at Sinai was not the finished law. Or at least it was not the full 613 laws. Many of the laws were given long after this while the Israelites walked in the wilderness. We see them added throughout Leviticus, Numbers and Deuteronomy. All of which come after the events at mount Sinai. 

When we look at the New commandment given by Jesus we see that this was also given through God.  

Jesus tells us that what he said was actually what the FATHER told him to say. This would include the NEW commandment that Jesus said he gave.

John 12-49 For I have not spoken of myself; but the Father which sent me, he gave me a commandment, what I should say, and what I should speak.

So we see that the New commandment given by Jesus was actually given by God through Jesus. 

God stated that he would put HIS Torah upon the hearts of his people in the New covenant. 

Jeremiah 31- 33 But this shall be the covenant that I will make with the house of Israel; After those days, saith the LORD, I will put my law in their inward parts, and write it in their hearts; and will be their God, and they shall be my people.

The New commandment IS God’s command so it is God’s Torah. ANY command by God is his Torah. The law hasn’t simply changed location in the New covenant it is a new law. 

The law in the New covenant has changed

Hebrews 7-12 For the priesthood being changed, there is made of necessity a change also of the law.

Jesus brought in the NEW covenant. 

Luke 22-20 Likewise also the cup after supper, saying, This cup is the new testament in my blood, which is shed for you.

Hebrews 9-15 And for this cause he is the mediator of the new testament, that by means of death, for the redemption of the transgressions that were under the first testament, they which are called might receive the promise of eternal inheritance.

In the book of Isaiah, speaking of the Messiah, God himself stated that the OLD would pass away and the new would come forth. 

Isaiah 42:9 Behold, the former things are come to pass, and new things do I declare: before they spring forth I tell you of them.

John tells us the Torah of the New covenant. God’s commandments.  Believe on the name of his son Jesus Christ and love one another as Jesus commanded us to. 

1 John 3- 23 And this is his commandment, That we should believe on the name of his Son Jesus Christ, and love one another, as he gave us commandment

Neither of these 2 laws exist in the Torah of the Old covenant. 

Clearly the law has either been added to which would go against the Law keepers assertion that the law cannot be added to, or we have a new law.

The Bible asserts a new law in a new covenant not as the one made in the wilderness.