when you have categorical variable higher than two just in case of your marital status you have to dummy coding your variables. Let you want to add your marital status variable to your regression equation. Because you have single, married, divorced, widowed, you have to create three dummy coding variable and one referance category.Let single constitute your referance category. and create three dummy variables for your married, divorced and widowed individuals. let you coded in SPSS  single :1 , married: 2, Divorced: 3, widowed: 4 first you have to create three dummy variables since single is referance category (ıt will not incude regression analysis)

If you are using SPSS transform recode into different variables. send maritalstatus input variables name output married_dummy click old new variables    write old variables 2 new variables: 1 all other values: 0. click continue click ok.

Now you created a dummy variable for married individuals because 1 represent married individuals and 0 represent other categories.

repeat above step for divorced and widowed individuals. (recode into different variables)

enter regression equation your created dummy variables.

ın the regression equation each unstandardized regression coeeficient represent mean difference score between single and other marital status. For example in married individuals, unstandardized regression coefficient represent meanjob satisfaction difference score between married and single individuals.the same thing true also divorced and widowed individuals.

Agree With the answer Provided by Ertuğrul Şahin. But which software you are using ?