Your lender for the HELOC should have provided you a Form 1098. Contact your lender.
Although your lender is required to provide you with Form 1098 each year, you can report your HELOC interest without one. You should contact the lender first, however, to be sure the form isn't available.
If you received a year-end statement from the lender (possibly available on their website), you can use that information to enter your mortgage interest. Or use your own records if they are accurate. Note that this interest is deductible only if the HELOC is secured by a property you own.
Follow these instructions:
Additional Info: