Does income from SS and retirement count fully? If I work a few hours doing Uber do I have to file as self employed?

0-85% of Social Security is taxable, depending upon your other (Joint) income.

Count for what?  Yes SS and retirement can be taxed.  You have to enter SS and any 1099R you get.  Yes if you have any Uber expenses you have to use the Self Employed version.  You have to report self employment income of only $400 or more.

See these links and info for Uber..........
What do I need from Uber
https://ttlc.intuit.com/questions/3636642-what-do-i-need-from-uber-to-file-my-taxes   

How to get the Uber Discount
https://ttlc.intuit.com/questions/4514914-how-can-i-apply-my-uber-discount-to-my-turbotax-account

How to import from Uber
https://ttlc.intuit.com/questions/3776955-how-do-i-import-my-income-information-from-uber

And https://ttlc.intuit.com/questions/3776831-how-does-importing-from-uber-work  

Where to enter Uber & Lyft Income
https://ttlc.intuit.com/questions/3175807-where-do-i-enter-my-lyft-uber-income

How to enter expenses from the Uber Summary
https://ttlc.intuit.com/questions/3636641-how-do-i-enter-my-expenses-from-my-uber-tax-summary-in-turbotax-online   

Tax Tips for Uber, Lyft, Sidecar and other Car Sharing Drivers FAQ
https://turbotax.intuit.com/tax-tools/tax-tips/Self-Employment-Taxes/Tax-Tips-for-Uber--Lyft--Sidecar-and-other-Car-Sharing-Drivers/INF28820.html    

You will need to file a schedule C in your personal tax return for self employment income.  You will need to use the Self Employed Online version to fill out schedule C.

Here is some reading material……

IRS information on Self Employment….
http://www.irs.gov/Businesses/Small-Businesses-&-Self-Employed/Self-Employed-Individuals-Tax-Center

Pulication 334, Tax Guide for Small Business
http://www.irs.gov/pub/irs-pdf/p334.pdf  

Publication 535 Business Expenses
http://www.irs.gov/pub/irs-pdf/p535.pdf  

Self Employment tax (Scheduled SE) is generated if a person has $400 or more of net profit from self-employment on Schedule C.  You pay 15.3% for SE tax on 92.35% of your Net Profit greater than $400.  The 15.3% self employed SE Tax is to pay both the employer part and employee part of Social Security and Medicare.  So you get social security credit for it when you retire.  The SE tax is in addition to your regular income tax on the net profit.