Civil eviction process in AR

[Kevin C.]

Hi there. We have a tenant who has not paid rent for March (Due March 1) and we need to get her out of the house. We have tried accommodating her (She's going through a messy divorce) but she has just taken advantage of us and it's time to get her out. We sent a notice to quit last week, Wednesday, via certified mail signature required, and regular first class mail. She still has not picked up the certified mail, but did confirm via text message that she has received regular notice. 

I mailed the notice on March 22 and the notice indicates that she has until the 31st to vacate. She has indicated to us that she will not be out by the 31st because that's not enough time. We have described the consequences of not moving in great detail, but it looks like we're going to have to move forward with a formal eviction process. So my question is, what is our next step? If she is not out by Monday morning, what do I need to do?

I have read a lot of conflicting information on the eviction process here so I want to make sure I go in knowing as much as possible, and hopefully with as up-to-date info as I can.

Thanks in advance. Hopefully I can get a clearer picture of the process here.