Iowa Tax Sale Question

[John C]

When a property is acquired by tax sale, does that remove all leins?

Seller has  deed to the property and wants to sell as is/ where is. Iowa is abstract state and seller wants me to handle that cost.   I have heard around town there may be an IRS lein attached to the property. The seller said the act of tax sale/foreclosure wipes away all leins. Is this true or does a specific act need to take place?

Just wondering if I need to figure abstracting and title opinion into this?? Not a major expense really, also I just want to know for my own info.

Any other suggestions appreciated!!!