Mahsuplaşma öz tüketimi de içeriyor.

The sentence follows the very common Turkish pattern subject + object + verb.

• Mahsuplaşma = subject
• öz tüketimi de = object phrase
• içeriyor = verb

So, very literally, it is:

Mahsuplaşma → self-consumption too → includes

Turkish usually puts the finite verb at the end of the sentence.

Here de means also or too.

So öz tüketimi de means self-consumption too / also self-consumption.

It adds the idea that self-consumption is included in addition to something else already being discussed.

Because this de is a separate particle meaning also/too.

Compare:

• öz tüketimi de = self-consumption too / also self-consumption
• evde = at home, where -de is a suffix meaning in/on/at

So in this sentence, de is not a case ending. It is a separate word and must be written separately.

The -i here is the accusative marker for a specific direct object.

Base form:

• öz tüketim = self-consumption

In the sentence:

• öz tüketimi = the/self-consumption as the specific thing being included

Because içermek (to include) takes a direct object, Turkish often marks that object with the accusative when it is specific or definite in context.

So:

• öz tüketim içeriyor would sound more non-specific
• öz tüketimi içeriyor means it includes that/such self-consumption as a recognized item or category

• öz can mean self, own, or intrinsic
• tüketim means consumption

So öz tüketim means self-consumption.

In other words, it refers to consumption by the same person, producer, or entity rather than by an outside customer.

içeriyor comes from the verb içermek, which means to include or to contain.

Breakdown:

• içer- = verb stem
• -iyor = present continuous / progressive ending

So içeriyor literally means is including, but in natural English it is usually translated as includes or is including, depending on context.

Both are possible in Turkish, but they have slightly different feels.

• içeriyor is the -iyor form and is very common in modern Turkish for present-time descriptions and even general statements
• içerir is the aorist/simple present, and can sound more formal, more general, or more definition-like

So:

• Mahsuplaşma öz tüketimi de içeriyor = a natural, current statement
• Mahsuplaşma öz tüketimi de içerir = also possible, but slightly more formal or textbook-like

Mahsuplaşma is a verbal noun.

It comes from mahsuplaşmak, and the ending -ma turns the verb into a noun.

So it refers to the act or process of:

• offsetting
• netting
• settling accounts depending on context

In this sentence, mahsuplaşma is the subject: the process/system/arrangement that includes self-consumption.

No. Turkish does not have a definite article like English the.

So mahsuplaşma can mean:

• settlement
• the settlement
• netting
• the netting arrangement

The exact English choice depends on context, not on a separate Turkish word for the.

Yes:

• Mahsuplaşma = settlement / offsetting / netting
• öz tüketimi = self-consumption + accusative
• de = also / too
• içeriyor = includes / is including

A very literal gloss would be:

The settlement/netting also includes self-consumption.

Yes, Turkish allows some flexibility, but the default order here is very natural.

Current order:

• Mahsuplaşma öz tüketimi de içeriyor.

This is neutral and clear.

If you move things around, the meaning usually stays similar, but the focus changes. Turkish often changes word order to highlight a certain part of the sentence. Still, for learners, the version you have is the safest and most standard way to say it.