Where is my refund?

https://sa.www4.irs.gov/irfof/lang/en/irfofgetstatus.jsp

Your online IRS account 

https://www.irs.gov/payments/your-online-account

Tax withholding calculator

https://www.irs.gov/individuals/tax-withholding-estimator

Roth IRA conversion calculator

https://www.finansw.com/member/freedomtaxsvc/calculators/latest/RothTransfer.html