Can I add few tips onto my W-2 income to complete my last year requirement for 4 points social security credit

After you complete entry of the W-2 information, on one of the next screens following will be a screen labeled Let's check for uncommon situations, on that screen check the box labeled Unreported tips

Yes.  If you have unreported tips, then you will need to include them ALL on your return.  You should start by asking your employer for a corrected W-2 that accurately reports your tips. You cannot just add the amount you need for Social Security, you must add the correct amount.  If your employer does not correct your W-2, you will need to enter your W-2 as it appears on your form and then on the next screen when it asks about uncommon situations, select "Unreported Tips"

How do I enter unreported tips?