How do i get the wifi working it worked before but not now

Open your tab and check the wire or flix of your wifi connection maybe it's broken connection then fix it by soldering iron

Could you earlier use Wifi?
Do you have WiFi available?

If can't use WiFi, having signal it's network adapter is defective and you should claim your warranty.. If old, should seek for repair

Go to your setup setting and check your wifi setup might have change because it not storing the setting might have a problem with the tablet would replace if under warranty

WiFi only works when you are close to the hotspot (WIFI router)
A concrete wall will take away a lot of the connection. As will other WIFi router close to you. Not knowing how your situation is, makes it difficult to give a tailored solution.
Try to put your WiFI router as close to the place you are working most of the time. See if it is possible to change the channel you are working, when other routers are close to the place you are using the tablet. If you have some extra money, check if the tablet will work with the 5 GHz band and if so buy a router with 5GHz. Most people still work on the 2,4 GHz band and can degrade your connection.

Did you check your router is still working?
Are you sure it is still working correct?
To make sure it will work, just reset the WiFi router. If you can't find a reset button, just unplug the router for about half a minute. It will clear all tables, and I think after that it will work fine.

If you can click on your wifi and pick "forget" do that and then restart the tablet and try again. If that doesn't work try going to settings and resetting it to factory then it will be like a new one, if you can do it without wifi some tablets wont let you past the wifi screen until you sign on.

check you wifi and see if its ok.. are there too many items on it trying to run?..as in more than 4 computers..

I would guess your wifi broke.. but you can always ... try wifi elsewhere to verify... if it works then you need to manually connect to your wifi... I would attempt to get your Ip off the working one and copy the same IP and DNS for your wifi... since it's a tablet I would just reset it to factory settings if it just is stuck... you can back up your files VIA google or BUMP app

When you reset the tablet your tablet wifi settings, wifi name and password will be erased. You have to detect your wifi on the tablet, connect to it and enter password right?

I'm sure you've done this but try turning off wifi on iPad and then turning back on. Does your wifi name show?