ST. PAUL (AP) — Minnesota could be on the hook for $700 million in refunds if the state loses a case pending in tax court.

The case involves how multistate corporations calculate tax liability in Minnesota. It's scheduled to be heard later this month.

State Solicitor General Alan Gilbert gave the $700 million figure in court papers in November. Gilbert is representing the state Revenue Department in an appeal brought by Dallas-based Kimberly-Clark Corp.

Kimberly-Clark is asking for only $1.2 million plus interest. The company claims it should have been able to use a different formula for calculating tax liability in 2007-09 that would have saved it money.

Kimberly-Clark is a test case for seven other appeals from multistate corporate taxpayers that raise the same issue.