Jeśli wyślę raport dziś, jest szansa, że jutro dostanę odpowiedź.

Wyślę is the 1st person singular form of the verb wysłać (to send).

Grammatically, it looks like a present-tense form, but because wysłać is a perfective verb, its “present” forms actually refer to the future. So:

• wyślę = I will send

This is very common in Polish:

• zrobię = I will do
• napiszę = I will write
• dostanę = I will receive / get

So in this sentence, Jeśli wyślę raport dziś... means If I send / If I will send the report today..., but in natural English we usually just say If I send...

The infinitive is wysłać.

A useful pattern is:

• wysłać = to send
• wyślę = I will send
• wyślesz = you will send
• wyśle = he/she/it will send

This verb is perfective, so it focuses on completing the action: sending something off successfully.

Its imperfective partner is wysyłać, which is used for repeated, ongoing, or habitual sending:

• Wysyłam raporty co tydzień. = I send reports every week.
• Wyślę raport dziś. = I’ll send the report today.

For the same reason as wyślę.

• dostanę comes from dostać and means I will get / I will receive
• dostaję comes from dostawać and usually means I am getting / I get

Here the sentence refers to a single future result, so the perfective verb dostać is the natural choice:

• jutro dostanę odpowiedź = I’ll get a reply tomorrow

Compare:

• Często dostaję odpowiedzi późno. = I often get replies late.
• Jutro dostanę odpowiedź. = Tomorrow I’ll get a reply.

Because raport is the direct object of wyślę, and it is a masculine inanimate noun.

For many masculine inanimate nouns in Polish:

• nominative singular = accusative singular

So:

• raport = nominative
• raport = accusative

That is why Polish says:

• wyślę raport = I will send the report

You would see raportu in other cases, for example:

• Nie mam raportu. = I don’t have the report. (genitive)
• Nie wyślę raportu dziś. can also happen in negative sentences, because negation often requires the genitive.

Because odpowiedź is also functioning as a direct object after dostanę.

The noun odpowiedź is feminine, and in the singular its accusative form is the same as the nominative:

• odpowiedź = nominative singular
• odpowiedź = accusative singular

So:

• dostanę odpowiedź = I will get a reply

But in other cases it changes:

• Nie ma odpowiedzi. = There is no reply.
• Potrzebuję odpowiedzi. = I need a reply.

Jest szansa, że... literally means There is a chance that...

It is a very common Polish way to express possibility.

So:

• jest szansa, że jutro dostanę odpowiedź = there’s a chance that I’ll get a reply tomorrow

A few useful notes:

• Polish does not use articles like a or the, so jest szansa can mean there is a chance
• że introduces the following clause: that...

You may also hear similar expressions:

• Jest możliwe, że... = It’s possible that...
• Istnieje szansa, że... = There is a chance that...
  (more formal)

Że means that and introduces a subordinate clause.

In:

• jest szansa, że jutro dostanę odpowiedź

the part after że explains what the chance is.

So the structure is:

• jest szansa = there is a chance
• że jutro dostanę odpowiedź = that I’ll get a reply tomorrow

In English, that is sometimes optional:

• There’s a chance I’ll get a reply tomorrow
• There’s a chance that I’ll get a reply tomorrow

In Polish, że is normally needed here.

No. Jeśli is very common and natural, but you can also use jeżeli.

So these are both correct:

• Jeśli wyślę raport dziś, ...
• Jeżeli wyślę raport dziś, ...

The difference is small:

• jeśli is a bit more common in everyday speech
• jeżeli can sound slightly more formal or careful

In this sentence, jeśli is completely natural.

Because the sentence begins with a subordinate clause:

• Jeśli wyślę raport dziś = If I send the report today

Then comes the main clause:

• jest szansa, że jutro dostanę odpowiedź

In Polish, when a subordinate clause is separated from the main clause, a comma is normally required.

So the comma here is standard punctuation.

Yes, Polish word order is fairly flexible, though some versions sound more natural than others.

For example, these are all possible:

• Jeśli wyślę raport dziś, jest szansa, że jutro dostanę odpowiedź.
• Jeśli dziś wyślę raport, jest szansa, że jutro dostanę odpowiedź.
• Jest szansa, że jutro dostanę odpowiedź, jeśli dziś wyślę raport.

The original sentence is natural and clear. Changing the order may shift emphasis slightly:

• dziś earlier can emphasize today
• jutro earlier can emphasize tomorrow

They both mean today.

• dziś is slightly shorter and often feels a bit more compact
• dzisiaj is also very common and neutral

So you could also say:

• Jeśli wyślę raport dzisiaj, jest szansa, że jutro dostanę odpowiedź.

Both are correct. The choice is mostly stylistic.

This is an important difference between English and Polish.

In English, after if, we normally use the present form for future meaning:

• If I send the report today, ...

In Polish, it is normal to use a perfective verb form that has future meaning:

• Jeśli wyślę raport dziś, ...

So even though English avoids will after if, Polish does not work the same way. A form like wyślę is completely correct after jeśli.

Yes, the original sentence sounds natural.

A native speaker might also say:

• Jeśli dziś wyślę raport, jest szansa, że jutro dostanę odpowiedź.
• Jeśli wyślę dziś raport, to jest szansa, że jutro dostanę odpowiedź.

Adding to after the if clause is also possible in spoken Polish:

• Jeśli wyślę raport dziś, to jest szansa, że jutro dostanę odpowiedź.

That to is not necessary, but it can make the sentence sound a bit more conversational.

A few pronunciation points that English speakers often ask about:

• jeśli: the ś is a soft sh-like sound
• wyślę:
  
  • wyś- has the same soft ś
  • ę at the end is a nasal vowel; in normal speech, sentence-final ę is often pronounced less strongly nasally than learners expect
• dziś: again, soft ś
• że: pronounced roughly like zhe
• jutro: yu-tro
• dostanę: final ę again
• odpowiedź: the ending -dź is a soft consonant sound that can be difficult for English speakers

You do not need perfect phonetics immediately, but it helps to notice that Polish has several soft consonants here: ś, ź, dź.