A qualified workplace plan such as a 403b and 401k have a contribution limit of $23,000. It is unlikely that you have both a 401k and 403b since those plans are offered by different kinds of employers and I don't know of any employer that would offer both. You can only make contributions to a qualified workplace plan by payroll deduction -- no outside contributions allowed -- and all contributions are recorded on your W-2. You do not enter them again separately.
An IRA is NOT a 401k or 403b. IRAs are a different kind of plan covered by different IRS regulations. IRA contribution maximum is $7000 (or $8000 if over age 50) and you must enter your contributions manually.
