Get is the present tense form of the verb. Got is the past tense form as well as one of the two alternatives for the past participle. The other alternative for the past participle is gotten, which is generally preferred in the United States.
We get our raw materials from companies in
Texas and Nevada.
We got our raw materials from companies in
Texas and Nevada.
We have always gotten our chemicals from
companies in Texas and Nevada.
In informal contexts, many speakers use have got, 've got, or simply got to mean "have" or "must." You should avoid this usage of the verb get in your writing; instead, use have or must.
We have got several problems on our
hands.
We have several problems on our
hands.
We got several problems on our
hands.
We have several problems on our
hands.
We've got to find a solution to our
problems.
We must find a solution to our
problems.