Your F-1 nonresident status included 2014, 2015, 2016, 2017 and 2018. Starting January 1, 2019 you need to start counting your US days of presence. So you are a full year resident and can file a tax return with TurboTax.
Your relocation bonus should be reported in the state you moved to as reflected on your W-2.
Please review the following for your FICA question.
Also on IRS website says Student FICA exemption is applicable to Residents under some cases
"This exemption also applies to any period in which the foreign student is in "practical training" allowed by USCIS, as long as the foreign student is still a NONRESIDENT ALIEN under the Internal Revenue Code. Foreign students in F-1, J-1, M-1, Q-1 or Q-2 nonimmigrant status who have been in the United States more than 5 calendar years are RESIDENT ALIENS and are liable for social security/Medicare taxes (unless they are exempt from FICA under the "student FICA exemption" discussed below)."
"Also, the Internal Revenue Code provides one exemption from social security/Medicare taxes for foreign students and another exemption from social security/Medicare taxes for all students, American and foreign. This is the so-called "student FICA exemption", and it may operate to exempt a foreign student from social security/Medicare taxes even though the foreign student has already become a RESIDENT ALIEN. For employment which occurs after April 1, 2005, Revenue Procedure 2005-11 provides instructions for determining who is eligible for the "student FICA exemption"
Student FICA Exception
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