I efiled & paid via Turbotax, later received a fine How do I pay via Turbo Tax?

[bjsanders_]

I was fined for failure to pay on estimated quarterly income. I draw Social Security & see annual capital gains report from my broker

[DoninGA]

Penalties and/or interest owed cannot be paid through TurboTax.

The notice you received from the IRS would have given you information on how to pay the penalty.

Or use the IRS payment website - https://www.irs.gov/payments