What form does a self-employed individual use , no employees, the pay the first half of the section 2032 deferral that's due on 12/31/21?

I thought I read that IRS will be sending statements out for this, I would guess a payment voucher would be included.   

I dont see an option for the SE deferred taxes showing on IRS Direct Pay yet, but I would think at some point it would appear there as well.

Maybe when the client receives the IRS statement / payment voucher consider having the client pay the entire amount since you said it was small and then you will be done with it... Just my opinion

https://www.irs.gov/newsroom/how-self-employed-individuals-and-household-employers-repay-deferred-social-security-tax#:~:text=Taxpayers%20can%20visit%20EFTPS.gov,where%20the%20payment%20was%20deferred.

I chose to do the deferral on my own return and received the IRS letter last night. The reply voucher was in the letter. Payment goes to Ogden UT 84201-0059.

Letter number is LTR3064C with a barcode for my SS# and a notation of "BODCD-NOBOD"   (I have not determined what that notation means.)  The reply voucher does NOT have any dollar amount even though the letter mentioned once the amount that I deferred and that it was due half at 12-31-21 and half at 12-31-22 as well as saying that I could choose otherwise.

This letter does not mention paying thru EFTPS even though the IRS press release 2021-96  (July 6, 2021) suggested EFTPS and other methods.