Line 6a and 6b are on your 1040 tax return not the W2. Look at your 1040 tax return and see if line 1 is right for wages. Did you get any 1099 forms? Did you get a 1095A for ACA Marketplace health insurance?
On. the 1040 line 37 is for tax due. If your W2 is less than 13,850 you should not owe any tax. Did they take any tax withholding out in W2 box 2? Or any withholding from your SSA-1099?
What lines don't you understand on the 1040? Before filing, You can preview the 1040 or print the whole return
https://ttlc.intuit.com/community/accessing/help/how-do-i-preview-my-turbotax-online-return-before-f...
