How can i see my employment history? such as beginning and end dates

[DoninGA]

That information is not on a tax return.  Only you would know your employment history with start and end dates, or you  could contact your former employers.

Or you can use the Social Security Form SSA-7050-F4 to request your employment history to include employer name and addresses - https://www.ssa.gov/forms/ssa-7050.pdf

There is a $91 fee for this information from Social Security.