I entered bank account number incorrectly. Received letter from IRS two weeks after due date indicating RETURN: INVALID ACCOUNT NUMBER STRUCTURE. What is ~2 week penalty?

[fozman]

How are late penalties determined and how do I pay them?

[DoninGA · Accepted solution]

The IRS will send you a bill in the mail for the penalties.  

See this IRS Tax Topic for penalties - https://www.irs.gov/taxtopics/tc653.html

[bwa]

For a two week delay in payment the penalty would be 1/2 of 1% (e.g., for a $1,000 balance due it would be $5.00)