I imported my income from quicken self employed. Do I need to enter a 1099-K that includes that info? I am concerned about a double entry.

No, you do not have to specifically report your 1099-K.  As long as your Quicken account had all your income reported you are good to go!

Thanks so much for this answer! I've been doing our family taxes for years, and this time PayPal sent my husband a 1099-K. My husband's business is a dba, and I carefully track all personal and business transactions daily in Quicken. I imported all the Quicken data into TurboTax, then entered that 1099-K. I just about panicked when I saw the Tax Due double after I put in that 1099-K. I like those numbers better now that I have deleted the 1099-K again.