I didn't receive a 1098 for my HELOC since interest was under $600, how to I report on my return? I paid $564.49.

You should be able to get the information you need by contacting your lender. They'll be able to give you their Tax Identification Number (TIN). You can also access your account online and get a transaction/balance history. You may also need to review your mortgage documents for the information.  

Box 1 is for the Mortgage interest you paid the lender. 

Box 2 Shows the outstanding principal on the mortgage as of January 1 of the calendar year. If the mortgage originated in the calendar year, shows the mortgage principal as of the date of origination. If the recipient/lender acquired the loan in the calendar year, shows the mortgage principal as of the date of acquisition.

Box 3. Shows the date of the mortgage origination.