Verify the following
- All tabs have meaningful names
- Remove all blank worksheets
- Cell A1 is not blank and contains the title of the page
- Every column should have a header describing the data
- Avoid merging cells, it makes it difficult for screen reader users to track data
- Ensure text is readable and is a contrasting color from the background (Base font: 12pt
- Avoid text in images
- Add alt text to describe visual components
- Run the Accessibility Checker (Select the Tools menu | Check accessibility) and correct items as necessary