What is the 09I file format?
A file with the .09I extension is a file known as ProSeries Tax. It belongs to the Misc Files category. This format is associated with Intuit Inc..
The reliable way to open a .09I file is with software that recognises this exact format, rather than guessing from the file name. If you are not sure what created a file, our file identifier can read its first bytes and name the real format, even when the file has been renamed.
We are still gathering the list of programs that open .09I files. A fully verified, hand-written description of this format is being prepared; until then, the details on this page are drawn directly from our database.
Format details
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