"How do I actually pay? Is the money just taken out of my account?"
If you have federal tax due you can pay by mailing your payment with the 1040V voucher, (which has the address printed on it, having the payment taken out of a designated bank account, or you can pay directly on the IRS website.
https://www.irs.gov/payments/direct-pay
https://ttlc.intuit.com/community/tax-payments/help/how-can-i-pay-my-federal-taxes/00/26212
"After I file them, would I be able to forget about it completely since I no longer use the account or make money from it?"
Sorry--no idea how your account with Onlyfans works or what you are to do about it. Ask them.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
