I have reported a few interest income, dividend income, and aggregate capital gains. These are straightforward inputs from PDF files. My total amount is less than half of sum of all individual amount. FYI, I did exact the same thing last year, the total amount however was the sum of all individual entries.
There may be a number of reasons the total you see on your return is less than the sum of the individual entries. Some of these items are taxed differently than others and appear on different areas of your tax return. Some may not be taxable at all. The capital gains you entered may be offset by capital losses.
If you are using TurboTax Online, you can preview your return before filing to find out how your taxes were calculated. See here for details.
If you are using TurboTax Desktop, you can switch to Forms mode by clicking Forms at the top and then look at the forms and worksheets that TurboTax has prepared from your entries. You can click inside any numerical entry, right click and get the source of the entry.
Thank you for replying. After several attempts, I deleted the 1099-div table and found that other entries (1099-Int, capital gains) summed up correctly. So, I manually imported the 1099-div. Everything looks good.
(Afterward, I tried to find the cause of the problem by re-importing the 1099-div PDF file and compared the outcomes with my manually imported numbers. All entries looked identical. However, TurboTax (online) kept dropping 1099-div data from the final summation when the PDF file is used. Still puzzled).