Only if the IRS/SEP/SIMPLE box is marked on the Form 1099-R is the account an IRA. A pension plans would generally not be an IRA.
There would typically be only one Form 1099-R reporting the total of these two distributions in 2019, so if you received two Forms 1099-R they are likely for distributions from two different retirement accounts. If you received two Forms 1099-R and neither is marked CORRECTED, enter both by clicking the Add Another 1099-R on the Your 1099-R Entries page.
On the Form 1099-R for the distribution from the pension plan, box 2a should show the taxable amount that is being included on Form 1040 line 4d. If the other account is an IRA and you have basis in nondeductible traditional IRA contributions, the taxable amount is calculated on Form 8606 Part I; be sure that you have clicked the Continue button on the Your 1099-R Entries page and, if asked, you have entered your year-end balance in traditional IRAs.
