Upload your file, from Word, Excel, or PowerPoint into Adobe Acrobat
Go to the Options Menu and click New Tag, create a Heading 1 tag. Now highlight the heading you have for your document and right click your <H1> tag. Click Create Tag from Selection.
Go back to the Options Menu and create Table Header tags or <TH>. Highlight your Table Headers one by one and place them into their own <TH> tags.
Go back to the Options Menu again and create Table Data tags or <TD>. Highlight your Table Data one by one and place them into their own <TD> tags.
Create Table Row Tags or <TR> for each of your table rows. So if you have two table rows (including header rows, you need to make two <TR> tags. Place all of the <TH> tags in one <TR> tag and all of the <TD> tags in the other <TR> tag.
Create a Table tag and place your <TR> tags inside it. Now open up all of your tags to be sure they are in order. If a data cell is skipped, be sure it is tagged correctly and get it into the right place in the hierarchy.