Does a Christian currently have remission of all their sins

There is no need for remission where there is no sin, and it is impossible for us regular humans to "atone" for sin, so your question is meaningless.

1 John 1
1 That which was from the beginning, which we have heard, which we have seen with our eyes, which we have looked upon, and our hands have handled, of the word of life: 2 For the life was manifested; and we have seen and do bear witness, and declare unto you the life eternal, which was with the Father, and hath appeared to us: 3 That which we have seen and have heard, we declare unto you, that you also may have fellowship with us, and our fellowship may be with the Father, and with his Son Jesus Christ. 4 And these things we write to you, that you may rejoice, and your joy may be full. 5 And this is the declaration which we have heard from him, and declare unto you: That God is light, and in him there is no darkness.

6 If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth. 7 But if we walk in the light, as he also is in the light, we have fellowship one with another, and the blood of Jesus Christ his Son cleanseth us from all sin. 8 If we say that we have no sin, we deceive ourselves, and the truth is not in us. 9 If we confess our sins, he is faithful and just, to forgive us our sins, and to cleanse us from all iniquity. 10 If we say that we have not sinned, we make him a liar, and his word is not in us.

The answer is simple. How many of your sins were current when Jesus died? Of course, none. So all your sins are already paid for.
Ephesians 1:7

"In Him we have redemption through His blood, the forgiveness of our trespasses, according to the riches of His grace."

We have redemption and forgiveness. It's ours right now. Jesus is the Lamb slain from the foundation of the world. (Rev 13:8) All of mankind's sin was future then - including yours and mine

JESUS DID NOT NOR WILL HE EVER ATONE FOR OUR PAST PRESENT, AND FUTURE SINS! THE BLOOD OF CHRIST DOES NOT REMIT SINS NOT ATONED FOR!

THERE IS NO BIBLE SCRIPTURE PROVING WE HAVE REMISSION OF SINS WE HAVE NOT ATONED FOR!

How do you atone for your sins?

Totally false. How can a sinner atone for his sin? The wages of sin is death. The only atonement that can be made is death. Jesus died so that we do not have to suffer death. Your forum name obviously means nothing to you.

Actually, there is scripture saying if we do sin we have an Advocate, Jesus Yeshua, Who will plead the Father for each of us.
I believe we are given this assurance because our Loving Maker knows we are not His Only Begotten, but a part of Him. Our perfection comes on His day. We should never doubt this nor blur its meaning.

So you do know, it is necessary for each one of us to atone for our sins.

You have a ridiculously shortsighted view of human capacity for sin.

Not in the least!

Only physical death limits the capacity to sin. Even the indwelling Holy Spirit doesn't limit the capacity, only the likelihood and motivation.

No. We cannot atone for our sins. This is the entire reason God sent Jesus to do it for us.

You shed your own blood?