Urzędniczka daje mi formularz i mówi, że mam go spokojnie wypełnić.

Urzędniczka means female clerk / female office worker. It is the feminine form of urzędnik (clerk, masculine).

The ending -ka is a very common way to form feminine nouns in Polish:

• nauczyciel → nauczycielka
• sprzedawca → sprzedawczyni or sometimes another feminine pattern
• urzędnik → urzędniczka

So this sentence specifically tells us the person is a woman.

Because the verb dawać / dać (to give) usually takes:

• the thing being given in the accusative
• the person receiving it in the dative

So:

• formularz = the form → accusative
• mi = to me → dative

Compare:

• daje mi formularz = she gives me a form
• daje mu formularz = she gives him a form
• daje nam formularz = she gives us a form

Mi is the unstressed dative form of ja.
The fuller form is mnie, but after a verb like this, mi is usually the most natural:

• Daje mi formularz. = normal
• Daje mnie formularz. = wrong here

Because formularz is a masculine inanimate noun, and for masculine inanimate nouns, the accusative singular is usually the same as the nominative singular.

So:

• nominative: formularz
• accusative: formularz

That is why:

• Urzędniczka daje mi formularz.

Compare this with a masculine animate noun, where the accusative usually changes:

• nominative: student
• accusative: studenta

So Polish treats formularz grammatically like an inanimate object, which is why its form stays the same here.

This part literally works like:

• mówi = she says
• że = that
• mam = I have / I am supposed to
• go = it
• spokojnie = calmly / without rushing / take your time
• wypełnić = to fill out / complete

So grammatically, it is:

She says that I am supposed to fill it out calmly / at ease.

In Polish, mieć + infinitive often means:

• to be supposed to
• to have to
• to be expected to

So mam wypełnić is not just plain possession (I have), but more like:

• I’m to fill it out
• I should fill it out
• I’m supposed to fill it out

Both can express obligation, but they are not identical.

• muszę wypełnić = I must fill it out
• mam wypełnić = I am supposed to fill it out / I’m to fill it out

Mam + infinitive often sounds a bit more like:

• an instruction
• an expectation
• something assigned to you

In this sentence, the clerk is telling the speaker what they should do next, so mam wypełnić fits very naturally.

Go means him/it in the accusative form, and here it refers to formularz.

Since formularz is masculine singular, the pronoun replacing it is:

• go = it

So:

• formularz → go

This is very natural in Polish. Instead of repeating the noun, Polish often uses a pronoun:

• mam formularz wypełnić would sound odd here
• mam go wypełnić = I’m supposed to fill it out

In Polish, object pronouns like go, ją, mu, mi often appear before the infinitive or near the verb cluster.

So:

• mam go wypełnić = the normal pattern

This is much more natural than:

• mam wypełnić go

The second version is possible in some contexts, but it usually sounds more marked, more emphatic, or less neutral.

So in everyday Polish:

• mam go wypełnić is the standard, natural order.

Yes, literally spokojnie means calmly, but in this context it often means something like:

• take your time
• without stress
• no rush
• carefully and calmly

So the clerk is not necessarily instructing the person to adopt a calm emotional state in a strict literal sense. She is reassuring them:

• fill it out at ease
• you can fill it out calmly
• no need to rush

This kind of adverb is very common in Polish conversation.

Because wypełnić is the perfective form, and here the focus is on completing the form.

Polish verbs often come in aspect pairs:

• wypełniać = imperfective → filling out, being in the process of filling out, doing it in general
• wypełnić = perfective → fill out completely, finish filling out

After mam in a sentence like this, Polish very often uses the perfective infinitive when the point is to complete a task:

• mam go wypełnić = I’m supposed to fill it out (and finish it)

If you used wypełniać, it would sound more like an ongoing activity or a general repeated action, which is not the main idea here.

Because mówi, że mam... reports what the clerk says as a statement about the speaker’s obligation.

• mówi, że mam go wypełnić = she says that I am supposed to fill it out

Polish can also use żeby-type constructions, but they work differently and often sound more like:

• telling someone to do something
• expressing purpose
• a more explicitly subordinate command

For example:

• mówi, żebym go wypełnił = she tells me to fill it out

That is also possible, but it is a slightly different structure.

The sentence you have uses reported obligation:

• she says that I am to fill it out

Because Polish often uses the present tense for actions happening right now in a scene or narrative:

• Urzędniczka daje mi formularz = The clerk is giving me a form / gives me a form

In English, we might naturally say:

• The clerk gives me a form
• The clerk is giving me a form

Polish present tense can cover both kinds of meanings depending on context.

Also, dawać is imperfective, so daje fits the idea of a current action in progress or a general present event.

Polish word order is more flexible than English, but the original order is very natural and neutral:

Urzędniczka daje mi formularz i mówi, że mam go spokojnie wypełnić.

You could rearrange parts for emphasis, for example:

• Urzędniczka daje formularz mi... → unusual, marked
• Formularz daje mi urzędniczka... → very emphatic, unusual in normal speech
• ...że spokojnie mam go wypełnić → possible but less natural than the original

So while Polish allows flexibility, not every grammatically possible order sounds equally normal. The version given is the standard, natural one.

A few useful pronunciation notes:

• urzędniczka

  • rz sounds like the Polish ż
  • ę is a nasal vowel, though in real speech it may be pronounced a bit differently depending on context
  • czk is a consonant cluster that may take practice

• mówi

  • pronounced roughly MOO-vee

• że

  • the ż is like the s in measure

• wypełnić

  • ł sounds like English w
  • so the middle part is roughly like pew
  • ń is a soft n sound

• spokojnie

  • j sounds like English y
  • so it is roughly spo-KOY-nye

The exact sounds are worth listening to from native audio, because Polish spelling is fairly regular, but some consonants and nasal vowels are unfamiliar to English speakers.