Завтра утром я занесу заявление в деканат.

Because занесу is the simple future of a perfective verb: занести.

In Russian:

• imperfective verbs form the future with быть
  • infinitive
    
    • буду заносить
• perfective verbs use present-looking endings to express future
  
  • занесу

So я занесу means I will bring / I will drop off, not I bring.

This is a very important Russian pattern:

• делаю = I am doing / I do
• сделаю = I will do

The same idea applies here:

• заношу = I am bringing in / I bring in
• занесу = I will bring in / I will drop off

Here занесу means something like:

• I’ll bring in
• I’ll drop off
• I’ll deliver

The verb занести often implies taking something somewhere, often into an office, institution, room, or administrative place.

In this sentence, занесу заявление в деканат is a very natural way to say that you will take the application to the dean’s office and leave it there.

It is not just general motion like I’ll carry. It has a more specific sense of bringing something to a destination.

Because Russian often uses the instrumental case for times of day in expressions like:

• утром = in the morning
• днём = in the daytime / during the day
• вечером = in the evening
• ночью = at night

So:

• завтра утром = tomorrow morning

This is a fixed and very common pattern. You should learn утром as a standard adverbial time expression.

Yes, both are time expressions, but they give different kinds of information:

• завтра = tomorrow
• утром = in the morning

Together they mean:

• tomorrow morning

Russian often combines time expressions this way, just like English does:

• сегодня вечером = this evening
• в понедельник утром = Monday morning
• завтра днём = tomorrow afternoon / during the day

So завтра утром is completely natural.

It is in the accusative case, but for this noun the accusative looks exactly like the nominative.

• nominative: заявление
• accusative: заявление

That happens because:

1. заявление is neuter
2. it is inanimate

For many neuter inanimate nouns, nominative and accusative are identical.

So in the sentence:

• я занесу заявление

заявление is the direct object, and it is in the accusative, even though its form does not change.

Because this sentence describes motion toward a destination, not location.

Russian uses:

• в + accusative = into / to
• в + prepositional = in / inside

So:

• в деканат = to the dean’s office
• в деканате = in the dean’s office

Compare:

• Я занесу заявление в деканат. = I’ll take the application to the dean’s office.
• Я сейчас в деканате. = I’m in the dean’s office now.

Since the speaker is moving the document to that place, в деканат is correct.

Деканат usually means the dean’s office or the faculty administrative office at a university.

It does not usually mean the dean as a person. It refers more to the office or administrative department connected with the dean/faculty.

So занести заявление в деканат is a very typical university-related phrase, meaning to submit or drop off paperwork at that office.

Yes, very often.

Russian frequently drops subject pronouns when the verb form already makes the subject clear. Since занесу clearly means I will bring/drop off, you can say:

• Завтра утром занесу заявление в деканат.

That sounds natural in conversation.

Including я can add:

• emphasis
• contrast
• clarity

For example, if you want to stress I rather than someone else:

• Завтра утром я занесу заявление в деканат, а не ты.

So in your sentence, я is optional, but not wrong.

Yes, Russian word order is flexible.

The sentence as written is very natural and neutral:

• Завтра утром = setting the time first
• я = subject
• занесу заявление = action + object
• в деканат = destination

But other orders are also possible, depending on emphasis:

• Я завтра утром занесу заявление в деканат.
  Slightly more focus on I
• Заявление я занесу в деканат завтра утром.
  More focus on the application
• В деканат я занесу заявление завтра утром.
  More focus on the destination

English word order is much stricter; Russian uses word order more for information structure and emphasis than for basic grammar.

These verbs are related but not identical.

• нести = to carry, to be carrying
• отнести = to take something away / carry something to a place
• занести = to bring in / drop off / deliver into a place

In this sentence, занести works well because it suggests bringing the application to an office/institution and leaving it there.

Very roughly:

• нести focuses on the act of carrying
• отнести often focuses on taking something from one place to another
• занести often suggests bringing something in somewhere, especially into an office or institution

In real life, both отнести заявление в деканат and занести заявление в деканат can be possible, but занести sounds especially natural for dropping off paperwork.

Yes, завтра утром is the normal, natural order.

Russian usually places the broader time frame first:

• завтра = tomorrow
• утром = in the morning

So:

• завтра утром = tomorrow morning

The order утром завтра is unusual and would only appear in special contexts for emphasis or poetic/stylized speech.

So for everyday Russian, use:

• завтра утром

The main stress is:

• За́втра
• у́тром
• я занесу́
• заявле́ние
• в декана́т

A simple pronunciation guide:

• За́втра у́тром я занесу́ заявле́ние в декана́т.

A few useful notes:

• занесу́ has stress on the final -у
• заявле́ние has stress on ле
• декана́т has stress on the final а

If spoken naturally, the sentence may sound fairly smooth and connected, with the main sentence stress often falling on the most important new information, depending on context.

Yes, absolutely.

Even though the literal image is bringing or dropping off the document, in context this often corresponds to English:

• I’ll submit the application to the dean’s office tomorrow morning.

Russian often uses everyday movement verbs for administrative actions involving papers and forms. So if a student says this, the practical meaning is very likely submit or hand in the application.

Yes, it is fully natural and idiomatic.

It sounds like something a student might really say in everyday life, especially in a university context. It is clear, grammatically correct, and stylistically neutral.

A native speaker would understand it as a normal statement about a planned action:

• Tomorrow morning I’ll drop off / submit the application at the dean’s office.