Where do I find how much social security tax I owe for my deferred payments? (self-employed)

[jennie_f]

I am self-employed and I selected that I want to defer some of my social security taxes and pay half of that amount at the end of this year and the other half next year. When I filled it out, it showed me how much I will owe but now that I filed my tax return, I can't find it anywhere. How do I find out how much I owe? Thanks!

[ColeenD3]

Allowed SE tax deferral amount (worksheet to Schedule 3, line 12e)

In general, the amount that a taxpayer is allowed to defer is the smaller of:

• • The maximum deferral amount, or
  • The tax underpayment, i.e. the difference between total taxes due and total taxes paid in.