Can I import a soil test taken before I started using SnapPlus?
You need to check with the soil test lab which analyzed your samples, but most if not all will be able to create a SnapPlus formatted import file from older soil tests.

What is the format of a SnapPlus soil test import file, and how can I look at one.
SnapPlus soil test import files are simple text files that can be viewed and edited with any text editor such as Notepad or Wordpad. Instructions for creating one are here. Import templates are also in your SnapPlus program under “Help->Reference Docs (N to Z)”.

I have a soil test import file from my lab, but it won’t import into SnapPlus.
Several users have reported situations where soil test import files downloaded from their lab would not work with SnapPlus. What has happened in these cases is that some or all of the lines in the file were split with extra carriage returns. If you are having problems with a file, you might be able to see what is wrong by looking at the data preview grid in SnapPlus’ soil test import dialog box. You can also look at the file in Notepad or Wordpad. If the problem is not obvious, you should contact your soil test lab and/or the SnapPlus support team.