The perfect tense is formed using the present tense form of the verb 'haber' for that subject followed by the past participle of the verb.
The conjugations of 'haber' are: yo 'he'; tu 'has';él/ella/Vd. 'ha'; nosotros 'hemos'; vosotros 'habéis'; ellos/ellas/Vds 'han'.
For example 'He has eaten' is translated as 'Ha comido' in Spanish. 'You have all arrived' is 'habéis llegado'.