I paid interest on a personal loan and do not receive a form 1098. How do I report that on my taxes?

You don't.    Interest paid on a personal loan is not deductible.

Generally, Interest paid on personal loans is not tax-deductible. If you borrow to buy a car for personal use or to cover other personal expenses, you cannot deduct those interests. Similarly, interest paid on credit card balances is also not tax-deductible.

However, interest paid on mortgages, student loans, and business loans often can be deducted on your annual taxes to reduce your taxable income.  If this is a mortgage-related loan, without a Form 1098, you can enter the information by following these steps:

In TurboTax online,

• Sign in to your TurboTax account and select Pick up where you left off
• At the right upper corner, in the search box, type in "mortgage interest" and Enter
• Select Jump to mortgage interest
• Follow prompts

To see the change in the new law TCJA, click here: Mortgage interest