When you get to the Import Review Screen, you can make some ad hoc/'manual' changes to certain fields. Generally, if the field's font is black in colour, not grey, you can click on that field and type in your correction. This can be very helpful when you spot a spelling mistake.
However, if you find that the 'mistake' is a format issue (in all caps for example), or the mistakes is more systemic, we would encourage you to look to the template and the field settings and seek to apply corrective Text Casting, Data Transformations or field-specific formatting corrections (such as adding a leading zero to zip codes or correcting Postal Code formats).
Please Note: should you decide to use the 'Save Review Session' feature, these ad hoc, manual changes will not be saved.
***DID YOU KNOW? Series***
We are creating a series of useful hints and tips called 'Did You Know?'. If you type in 'Did You' into the Knowledge Base search bar, they will all appear. This list will grow over the coming months, so do check back in for any new ones.